Apple released an updated version of its iOS Security white paper - something you can read here - which explains what happens to your fingerprint data after you tap the Touch ID sensor. Each A7 processor has a unique secure space that Apple says it, nor can the A7 read, with each and every authentication session being encrypted end-to-end.

The company is also offering a detailed explanation of what it does with each of your fingerprint images, stating that the image of your fingerprint only lasts in memory until it is turned into a decryption key. There are also safeguards, which have been known, where after 48 hours of inactivity, it will wipe your key away, with a reboot or five failed login attempts performing the same action.